Severalpeoplewrote some really nice posts about Play Perl. Go read them if you haven't already, they explain better why Play Perl is important than I do, with my non-native crude English writing skills :)

So, what's next?
I think most important features to add next are:

the ability to add a quest directly to some kind of a quest pool (without taking on them personally and immediately);

After all that, I'd love to finally get to the fun part: pre-scripted quests, especially for newbies (Example: "Pass a tutorial at perltuts.com"; another example: "Solve 10 new Project Euler problems in Perl and publish them online"). I want to get at least one example of such pre-scripted quest implemented and see how it will work out in practice.
And then after that, achievements.

Summing up: you guys are awesome, I didn't expect it to be so popular.
Now go and play some more :)
And don't forget that the final objective is to complete your quests and not just add them!

This is fun. Maybe even too much fun, I didn't get enough sleep last night :)
Hacking on a live website with real users is so much more interesting than developing it in a local sandbox.
(I'm developing and supporting a big website with >1M hits/day at my daily $job, but somehow it's just not the same.)

In the last 24 hours, I implemented:

open quests counter in /players list

News Feed with opened/closed quests and new comments

likes and comments counter in the quest list

several bugfixes and html/css improvements

I think that's more features than I've added in the last 2 months :)

The power of likes

play-perl.org is up.
It's a very, very early alpha. There are no achievements, no news feed (Upd: news feed is in), no pre-set quests, not enough quest metadata and almost no introductory texts.
Still, I chose to release what I have now, because I want to start dog-fooding it myself, and because I want to see if anyone will care enough to try it.
(Also, my self-inflicted deadline was February 1st; I wanted to launch it with more features, but other projects and procrastination got in the way, as usual.)